| abstract |
The purpose of the present invention provides: heat-expandable microspheres which give hollow resin particles that can be inhibited from suffering shell breakage or deformations, e.g., a dent, under a high pressure load; and a use of the heat-expandable microspheres. The heat-expandable microspheres of the present invention are each configured of a shell comprising a thermoplastic resin and a blowing agent which is enclosed in the shell and which gasifies upon heating, the thermoplastic resin being a polymer of polymerizable ingredients including a crosslinkable monomer (A) having a molecular weight of 500 or higher and having at least two (meth)acryloyl groups and a reactive carbon-carbon double bond besides the (meth)acryloyl groups. |